Related Experiment Videos
Experimental production of dermatitis in sheep with Pseudomonas aeruginosa
Abstract:
The attachment, to sheep skin, for 4 days, of control wool pads saturated with sterile culture medium which contained a bacteriostat, induced only a mild dermatitis, whereas wool pads saturated with Pseudomonas aeruginosa culture induced a subacute dermatitis characterised by scaling, microabscess formation and seropurulent exudate. Changes similar to the latter were observed in skin affected by natural fleece-rot which developed spontaneously after 7 days of artificial wetting and in which P. aeruginosa was the predominant species of bacteria. An exacerbatory, if not causal, role for this organism is suggested in the development of the dermatitis associated with fleece-rot and in the exudation of seropurulent material, a step essential in the development of body strike.
Insights
Pseudomonas aeruginosa infection causes subacute dermatitis in sheep, characterized by scaling and microabscesses. This bacterium plays a key role in fleece-rot dermatitis and seropurulent exudate, crucial for body strike development.
Area of Science:
- Veterinary Dermatology
- Microbiology
- Animal Science
Background:
- Fleece-rot is a spontaneous skin condition in sheep.
- The condition is often associated with bacterial involvement.
- Understanding the causative agents is crucial for effective management.
Purpose of the Study:
- To investigate the role of Pseudomonas aeruginosa in sheep dermatitis.
- To determine the contribution of P. aeruginosa to fleece-rot development.
- To elucidate the link between bacterial infection and body strike.
Main Methods:
- Sheep skin was inoculated with wool pads containing sterile medium or P. aeruginosa culture.
- Dermatitis development was monitored over 4 days.
- Natural fleece-rot cases were examined, and bacterial species identified.
Main Results:
- P. aeruginosa inoculation induced subacute dermatitis with scaling and microabscesses.
- Similar pathological changes were observed in natural fleece-rot cases.
- P. aeruginosa was the predominant bacterium in naturally occurring fleece-rot.
Conclusions:
- Pseudomonas aeruginosa exacerbates or causes dermatitis associated with fleece-rot.
- This bacterium is implicated in the production of seropurulent exudate.
- P. aeruginosa plays a critical role in the pathogenesis of body strike in sheep.